linux-kernel - Re: [PATCH] direct-io: Minor cleanups in do_blockdev_direct

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Date:   Fri, 15 Sep 2017 22:34:29 +0300
From:   Nikolay Borisov <nborisov@...e.com>
To:     viro@...iv.linux.org.uk
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] direct-io: Minor cleanups in do_blockdev_direct_IO



On  2.08.2017 10:10, Nikolay Borisov wrote:
> We already get the block counts and the calculate the end block at the
> beginning of the function. Let's use the local variables for consistency and
> readability. No functional changes
> 
> Signed-off-by: Nikolay Borisov <nborisov@...e.com>
> ---

ping

>  fs/direct-io.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/fs/direct-io.c b/fs/direct-io.c
> index 08cf27811e5a..987bc17a5f5e 100644
> --- a/fs/direct-io.c
> +++ b/fs/direct-io.c
> @@ -1139,7 +1139,7 @@ do_blockdev_direct_IO(struct kiocb *iocb, struct inode *inode,
>  	}
>  
>  	/* watch out for a 0 len io from a tricksy fs */
> -	if (iov_iter_rw(iter) == READ && !iov_iter_count(iter))
> +	if (iov_iter_rw(iter) == READ && !count)
>  		return 0;
>  
>  	dio = kmem_cache_alloc(dio_cache, GFP_KERNEL);
> @@ -1248,8 +1248,7 @@ do_blockdev_direct_IO(struct kiocb *iocb, struct inode *inode,
>  
>  	dio->should_dirty = (iter->type == ITER_IOVEC);
>  	sdio.iter = iter;
> -	sdio.final_block_in_request =
> -		(offset + iov_iter_count(iter)) >> blkbits;
> +	sdio.final_block_in_request = end >> blkbits;
>  
>  	/*
>  	 * In case of non-aligned buffers, we may need 2 more
>